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App Notes

Software & Driver


4.1 T4 Hardware

Support - T4/Hardware Overview

T4 Hardware Overview

The T4 has 3 different I/O areas:

  • Communication Edge: The communication edge (top edge in Figure 4.1-1) has a USB type B connector and RJ45 Ethernet connector. All power and host communication is handled by the USB interface.
  • Screw Terminal Edge: The screw terminal edge has convenient connections for the 2 analog outputs, 4 high-voltage analog inputs, and 4 flexible I/O (digital I/O, analog inputs, timers, or counters).  The screw terminals are arranged in blocks of 4, with each block consisting of Vs, GND, and two I/O.  Also on this edge are two LEDs. The Comm LED generally blinks with communication traffic, while the Status LED is used for other indications.
  • DB Edge: The DB Edge has a 15-pin female D-sub type connector (DB15) which has the 8 EIO lines and 4 CIO lines. The EIO lines are flexible like the FIO lines, while the CIO are dedicated digital I/O.

U3 Hardware Description

Figure 4.1-1. LabJack T4